A team from Imperial College London is developing a gaze-tracking device for the severely disabled. Using parts that cost less than $30, the device may help those with disabilities interact with computers and surroundings with only their eyes. The video shows a demonstration of the device in action as a user plays a game of Pong using only his eyes. The device is made up of two video game console cameras attached to a pair of glasses. The cameras constantly take pictures of the eye to locate the where the eye is pointing.